i want to purchase a tubing bender so i can make my own bumpers.ive got a few questions... 1. where can i find a decent, cheap unit. i want something that wont break, but i dont want to spend a fortune. the cheaper the better. 2. what is size dies should i get to build tube bumpers. i was thinking maybe 1.5" and 2". 3. can i use a pipe bender? i've seen them pretty cheap. not sure if they work for tube. i know the differences in design, but what would happen if you bent tube in a pipe bender. didnt look like you could do more than a 45* bend on the pipe bender, is there any other drawbacks>? thanks!